Materials

Currently, twenty one material types are available in SeismoStruct.

• Bilinear steel model - stl_bl
• Menegotto-Pinto steel model - stl_mp
• Dodd and Restrepo steel model - stl_dr
• Monti-Nuti steel model - stl_mn
• Buckling restrained steel braces model - stl_brb
• Bilinear steel model with isotropic strain hardening- stl_bl2
• Giuffre-Menegotto-Pinto Model with Isotropic Hardening – stl_gmp
• Ramberg-Osgood steel model - stl_ro
• Mander et al. nonlinear concrete model - con_ma
• Trilinear concrete model - con_tl
• Chang-Mander nonlinear concrete model - con_cm
• Kappos and Konstantinidis nonlinear concrete model - con_hs
• Engineered Cementitious Composites material– con_ecc
• Kent-Scott-Park concrete model – con_ksp
• Trilinear masonry model - mas_tl
• Parabolic masonry model - mas_par
• Superelastic shape-memory alloys model - se_sma
• Superelastic shape-memory alloys model 2 - se_sma2
• Trilinear FRP model - frp_tl
• Elastic material model - el_mat
• Generic Hysteretic model - hyst_mat

Materials that are to be available within a SeismoStruct project come defined in the Materials module, where the name (used to identify the material within the project), type (listed above) and mechanical properties (i.e. strength, modulus of elasticity, strain-hardening, etc.) of each particular material can be defined.

Two different options are available for introducing a new material type:

Add Material Class option
When users click on the Add Material Class button a dialog box appears, where the material class type and the material model may be selected using a drop-down menu. Materials, which are available within this option, are those most widely employed in the codes (e.g. C25/30, etc.)

Add General Material option
When users click on the Add General Material button a dialog box appears, where the material name and type may be defined.

Notes

1. By default, all the material types may be selected without any changes  in the Constitutive Models tab window (Tools > Project Settings > Constitutive Models) will appear in the Materials module.
2. In SeismoStruct, the Poisson coefficient is assumed as equal to 0.2 for concrete and 0.3 for steel.